Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.285..441s&link_type=abstract
(Royal Society, Discussion on the Moon - A New Appraisal from Space Missions and Laboratory Analyses, London, England, June 9-12
Astronomy and Astrophysics
Astronomy
5
Apollo Lunar Surface Experiments Package, Electrical Properties, Planetary Surfaces, Radar Astronomy, Mars Surface, Mercury (Planet), Microwave Emission, Venus (Planet)
Scientific paper
Measurements of the dielectric properties of the lunar surface are reviewed and compared for radar and microwave-emission studies, the Apollo 17 surface electrical properties (SEP) experiment, and predictions from Apollo soil-mechanics findings as well as laboratory investigations. A preliminary model of dielectric properties vs. depth at the Apollo 17 landing site is obtained from the SEP data, and a three-layer surface with three different dielectric constants is inferred. Derivation of dielectric constants from radar data is discussed, the microwave brightness temperature of the moon is plotted against wavelength, and an increase in temperature with depth is implied. Comparisons with results for other planets show that Mercury appears to have electrical properties virtually identical to those for the lunar surface, the dielectric constant for Venus is comparable to that for the moon, and the electrical properties of the Martian surface appear to be somewhat more variable than those of the lunar surface although the dielectric constants are generally similar.
Olhoeft G. R.
Strangway David W.
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